Marketplace will not help with training, beginner or common monsters, they are so easy to catch you will not be able to sell/trade them. We need a trash can or release button.

How can you be so sure about the Marketplace? confused

You don't know how the Marketplace works as well as I do. Heck, everyone, including us, don't know how the Marketplace works. We don't know if we can sell Mogas to the Sky Cats or to the players. We don't know what we'll get if we sell Mogas. So please don't be so sure of what the Marketplace does.